Steve,
I'm just guessing here, but it could be a simple matter of Torqueedo deciding to save money by providing a cheap, small, wall charger instead of something more substantial. Maybe they assumed most users would charge overnight and that a slow charge would be acceptable.
Jim
--- In electricboats@yahoogroups.com, "Steve" <sstuller@...> wrote:
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> I will try to clarify my confusion. According to the Torqeedo website it takes up to 15 hours to charge the lithium battery pack of the 1003 using the charger that is supplied with the motor. Given that the charger uses AC power there is no shortage of available energy so my question is why does it take so long to recharge the battery. The only reason I can think of is to preserve the battery life. Assuming that the charge rate of the supplied charger is 45 watts if I have a 150 watt 35 volt solar panel will the BMS system continue to limit the charge rate to 45 watts or will the battery accept a higher rate from the solar panel? The faster you can recharge the battery the better. Thanks. Steve S.
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> --- In electricboats@yahoogroups.com, "epowermarine" <todd@> wrote:
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> > Steve and all,
> > Yes there does seem to be confusion about charging the 503/1003 batteries and please lets not add to it.
> >
> > In a larger Lithium pack with a real BMS (like the 503/1003 battery) there can be separate electrical 'charge' and 'discharge' channels. Each individual cell is getting it's own charge voltage and the BMS is going to manage that. So although our actual motor voltage is 29.6v on the discharge side, the charge voltage in this particular case can be either 12vdc from a constant source or 24-56v variable from an external solar panel. the BMS will then handle the voltage distribution internally so each cell gets what it needs.
> >
> > In fact even the wall power supply that comes with the 503/1003 is 12vdc to the battery, not 40vdc like the old 801 model.
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> > In my original post I mentioned a cable that can serve as a direct connect between a 12v charging source (like a house battery) and the Torqeedo 503/1003 battery. It's real and it works. No inverter required.
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> > Capt. Todd
> > www.epowermarine.com
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> >
> > --- In electricboats@yahoogroups.com, "Steve" <sstuller@> wrote:
> > >
> > > I think there is some confusion about the charger provided by Torqeedo for the Travel 1003. It requires 110 volts AC and converts it to DC for the integrated battery - 40 volts DC if it's similar to the charger that came with the Travel 801. You therefore need an inverter if you plan to recharge from a 12 volt battery. It should be obvious that you can't recharge the 30 volt lithium battery directly from a 12 volt source. The charging voltage has to be higher than what is being charged for charging to occur. Thanks. Steve S.
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